Could we move this to the Elements project org?

...and can I be a crates.io owner?

If not, I will probably just fork and rename this -- it's a pretty useful tool for hacking on Elements transactions and I'd like to bring it up to date with rust-elements and add some Simplicity support.

該 issue 未指明任何檔案、測試或進入點。首先釐清所要求的工作是組織或 crates.io 所有權變更、fork 並重新命名、更新與 rust-elements 的相容性，還是新增 Simplicity 支援；在決定該範圍之前，無法定義完成標準。

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